builtwith-api
TypeScript/CLI wrapper for the BuiltWith API to look up technologies for domains/companies, retrieve lists and relationships, and support multiple response formats (JSON/XML/CSV/TSV/TXT). Includes an MCP server (separate package) exposing the same 13 methods as MCP tools.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Uses API key authentication (no OAuth/scopes described). README provides guidance to pass keys via env var/CLI flags but does not describe logging redaction, secret storage, or rate-limit/error semantics. HTTPS/TLS is implied by API usage via native fetch and typical web conventions, but explicit enforcement is not stated in the provided text.
⚡ Reliability
Best When
You want an agent/CLI-friendly way to query web technology intelligence from Node.js (>=18) using a single API key, including MCP tool integration.
Avoid When
You require built-in free tier clarity, explicit rate-limit/retry semantics, or very strict security posture around secret handling and data residency guarantees not stated in docs.
Use Cases
- • Domain technology intelligence and lookup
- • Finding sites using a given technology (with pagination)
- • Identifying related domains and keywords
- • Assessing technology adoption trends over time
- • Brand/company-to-website discovery
- • Live technology detection and trust/fraud signal checks
- • E-commerce product search
Not For
- • Use as a replacement for authoritative or legal-grade fraud/compliance determinations
- • Scenarios requiring fine-grained per-user authorization or OAuth delegation (API key only)
- • Applications needing an SDK with long-lived backward compatibility guarantees (noted breaking changes in v3)
Interface
Authentication
No OAuth described; auth appears to be a single API key used across library, CLI, and MCP server.
Pricing
Pricing and free-tier details are not provided in the provided README content.
Agent Metadata
Known Gotchas
- ⚠ TXT response format is noted as only for lists API
- ⚠ Pagination requires using the exact NextOffset value; 'END' indicates no more pages
- ⚠ v3 is ESM-only with named exports; agents/scripts using require() or default import may break
Alternatives
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Scores are editorial opinions as of 2026-03-30.